Additional features, settings, or issues not covered by specific Microsoft Teams categories
I noticed that your thread's tag is a Microsoft Teams for Business, refund eligibility depends on the subscription type and how long ago the renewal occurred. Microsoft documentation states that for many Microsoft 365 business subscriptions, a prorated refund or credit may be available if the subscription is canceled within 7 days of the renewal date.
If you are a Global Administrator or Billing Administrator, please sign in to the Microsoft 365 Admin Center, go to Billing > Your products, select the subscription, and review the available cancellation and refund options.
If the renewal occurred more than 7 days ago, or if no refund option is shown, you'll need to contact Microsoft Business Billing Support directly, as only the billing team can review any exception requests on a case-by-case basis.
I hope this helps.